Patent GB-190114601-A (GB)
Title: Improvements relating to Typewriters.
Inventor: SCHNEIDER WILHELM HEINRICH
Filed: 1901-07-17
Granted: 1902-05-29
Abstract: 14,601. Schneider, W. H. July 17. Type-writers.-Relates to type-writers in which a number of type-carriers are mounted so as to be capable of radial movement towards the impression point, and in which each type-carrier bears several types. One main key lever is provided for each type-carrier, and subsidiary levers or shift keys determine which of the types on the carrier shall be brought into use when a key is struck. In the machine shown in section in Fig. 1, each type - carrier 16 bears eight types, of which the upper four are normally in action and the lower four are brought into use by means of a shiftkey 61. No shift of the platen 33 is required in this machine. The main key levers 1 diverge radially from a common curved fulcrum rod 2, the centre of curvature being immediately beneath the impression point. The key lever 1 carries four keys 6, 23, 7, 39, which, together with the shift-key 61, control the eight types in the carrier 16. The carrier 16 forms the front portion of a link parallelogram comprising also the link 15, two-armed lever 14, 13, and striking-lever 17. The striking-levers are pivoted at 43 in projections extending from a curved frame 57, and their short lower arms are connected by links 42, bell-crank levers 41, and links 40 to the forward ends of the key levers 1. The curved frame 57 is carried by the vertical links 63 of a link parallelogram comprising also the horizontal levers 64, pivoted at 65, and the horizontal levers 59, pivoted at 58. One of the levers 59 is extended forward to form the shift-key lever 60, which therefore serves to lift the frame 57, striking-levers 17, and type-carriers 16. A stop 62 normally bears the weight of the frame 57 and the link-system 17, 14, &c. Pivoted at 4 on the key lever 1 is a twoarmed subsidiary key lever 5, 3, of which the rear arm 3 is connected by a curved link 11 with the arm 13 of the lever 13, 14. The front end of the key lever 5, 3 bears the front key 6. When this key is depressed, the lever 5. 3 is first rocked until its rear portion abuts against the stop 8, thus lifting the link 11 or arm 13 or depressing the typecarrier 16 to its lowest position. The main key lever 1 then descends, and the striking-lever 17 is thrown forward to make the impression. The key 39 is mounted at the front end of a subsidiary key lever 47, pivoted at 46 to the key lever 1. A link 45 connects the levers 47, 3..When the key 39 is depressed, the rear arm 3 of the lever 5, 3 is first depressed until it strikes the stop 9, thus depressing the aim 13 and raising the type-carrier to its highest position. The impression is then made, as before, by the descent of the key lever 1. The keys 7 and 23 are mounted on two additional subsidiary key levers, both pivoted on the key lever 1. Each of these subsidiary key levers bears two claws or pins which overhang the lever 5, 3 and serve to give it a definite alignment or position before the force is transmitted to the key lever 1. These alignments correspond to the two intermediate positions of the type-carrier. A curved frame 123, lined with felt or like material, receives the impact of the levers 13 on their return movement after impression. A fork 102, Figs. 1 and 2, guides or separates the front ends of the subsidiary key levers. The type-guiding frame 68, which slides on guides 71, is raised or lowered simultaneously with the type carriers 16 by means of vertical arms 72 carried by the movable frame 57. Beneath the key levers 1 is a universal bar 74<a >carried by a frame 74 which is pivoted at 73 and supports at its rear end a roll 75. This roll bears against the bent 76<1> of an escapementdog rocker 76 of known construction, which is secured at its centre to a spring 77. The escapement dogs co-operate in the usual way with a rack on the carriage 78. A spacing-key is provided for the direct actuation of the frame 74. The inkribbon feed is effected as follows :-The frame 74 bears vertical arms 80, Fig. 13, adapted to actuate the feed-wheels 94 mounted on the shafts 92 of the ribbon-spools 93. A plate 98, which carries the pillars 95, can be shifted by means of the knob 97 to reverse the movement of the ribbon. Alignment of the type is secured not only by the guiding- frame 68, Fig. 1, but also by the engagement of the heel 137 of the type-carrier with one of the recesses in a fixed rack-plate 135. The frame 85, on which the carriage 78 moves, is pivoted at 87, and can be thrown back against spring control for the inspection of the printed matter, or for the introduction of paper round the platen. The shift-key 61, instead of operating the frame 59 directly, may do so through the medium of an intermediate lever and link which increases the leverage on the frame. In a modified form of the machine, the type-carrier bears nine types, and two shift-keys are provided for the platen, which can thus be caused to assume either of three positions. Three keys only are in that case required on each main key lever, of which one is provided at each end of a subsidiary key lever such as 5, 3, Fig. 1, and the third is carried on a subsidiary lever bearing. overhanging claws which serve to give the firstmentioned subsidiary key lever an intermediate position. The pivoted points of the key .levers 1 are in front of the pivots of the striking-levers 17, and the key levers 1 are provided with heels on extensions to force the striking-levers rearwards. A modification in the construction of the key lever 1 is also described, in which only three subsidiary levers are used instead of four, the key 39 being carried directly on the rear arm 3 of the first subsidiary key lever 5, 3, and the lever 47 dispensed with.